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This FBI file concerns bureau assistance to local authorities following John Wayne Gacy's arrest in Cook County, Illinois, in the widely publicized murder investigation. The records are classified as domestic police cooperation and consist mainly of 1979 airtels, memoranda, transmittals, and records of information furnished to other agencies. Chicago, St. Louis, and Springfield offices exchanged requests concerning investigative activity in Des Plaines and Springfield, Illinois. A St. Louis request to FBI Headquarters sought Gacy's FBI identification record, and the released material includes a partially legible criminal-history printout.

FBI file number: 62-5154 | Documents span: 1979 | Released in 1 part
Names in this file: John Wayne Gacy
Subjects: serial murder investigation, domestic police cooperation, Cook County, FBI identification records, Illinois law enforcement

Also covered here:
John Wayne Gacy Crime Scene Photos: House, Crawl Space & Victims